ZipRecruiter

Log In

1

Codex Jobs in Washington, DC (NOW HIRING)

Nightwing

Senior Software Developer (Hybrid)

Annapolis, MD · On-site

$77K - $163K/yr

CODEX Overview CODEX (Cyber Offense and Defense Experts) division brings together an elite team of mission-focused industry experts who are well known for their ability to overcome the most advanced ...

Deloitte

AI Data Engineer - Senior Consultant

Mclean, VA · Hybrid

$105K - $145K/yr

Build and operationalize LLM-enabled capabilities (e.g., copilots, HR knowledge assistants, summarization, policy Q&A) using Claude/GPT(Codex)/Gemini, including secure endpoints, tool/function ...

Deloitte

AI Engineer III

Mclean, VA · Hybrid

Build and operationalize LLM-enabled capabilities (e.g., copilots, HR knowledge assistants, summarization, policy Q&A) using Claude/GPT(Codex)/Gemini, including secure endpoints, tool/function ...

Deloitte

AI Engineer Consultant

Mclean, VA · Hybrid

Build and operationalize LLM-enabled products (copilots, HR knowledge assistant, summarization, policy Q&A) using Claude/GPT(Codex)/Gemini, including prompt/context patterns and tool/function calling.

Deloitte

AI Engineer Consultant

Mclean, VA · Hybrid

Build and operationalize LLM-enabled capabilities (e.g., copilots, HR knowledge assistants, summarization, policy Q&A) using Claude/GPT(Codex)/Gemini, including secure endpoints, tool/function ...

Deloitte

AI Engineer Senior Consultant

Mclean, VA · Hybrid

$105K - $145K/yr

Build and operationalize LLM-enabled capabilities (e.g., copilots, HR knowledge assistants, summarization, policy Q&A) using Claude/GPT(Codex)/Gemini, including secure endpoints, tool/function ...

Deloitte

AI Data Engineer - Senior Consultant

Washington, DC · Hybrid

$118K - $162K/yr

Build and operationalize LLM-enabled capabilities (e.g., copilots, HR knowledge assistants, summarization, policy Q&A) using Claude/GPT(Codex)/Gemini, including secure endpoints, tool/function ...

History Factory

Staff Engineer

Washington, DC · On-site

You will use AI coding assistants (e.g., Codex-CLI, Claude Code) responsibly to accelerate delivery while adhering to safe, secure engineering practices. You will also collaborate with Creative ...

GEICO

Senior Engineer - Applied AI (Java)

Bethesda, MD · On-site

$133K - $176K/yr

Utilize AI-assisted development tools (e.g., Claude, Cursor, Codex) to accelerate development and improve engineering productivity. * Contribute to engineering best practices for reliability ...

Geico

Senior Engineer - Applied AI (Java)

Bethesda, MD

$133K - $176K/yr

Utilize AI-assisted development tools (e.g., Claude, Cursor, Codex) to accelerate development and improve engineering productivity. * Contribute to engineering best practices for reliability ...

next page

Showing results 1-20

All JobsCodex JobsCodex Jobs in Washington, DC

Codex information

What are popular job titles related to Codex jobs in Washington, DC? For Codex jobs in Washington, DC, the most frequently searched job titles are:
What job categories do people searching Codex jobs in Washington, DC look for? The top searched job categories for Codex jobs in Washington, DC are:
Codex jobs near you
Infographic showing various Codex job openings in Washington, DC as of June 2026, with employment types broken down into 100% Full Time. Highlights an 100% In-person job distribution.

Senior Software Developer (Hybrid)

Nightwing

Annapolis, MD • On-site

$77K - $163K/yr

Full-time

Posted 10 days ago

Job description

Nightwing provides technically advanced full-spectrum cyber, data operations, systems integration and intelligence mission support services to meet our customers' most demanding challenges. Our capabilities include cyber space operations, cyber defense and resiliency, vulnerability research, ubiquitous technical surveillance, data intelligence, lifecycle mission enablement, and software modernization. Nightwing brings disruptive technologies, agility, and competitive offerings to customers in the intelligence community, defense, civil, and commercial markets.
Job Description
Nightwing provides technically advanced full-spectrum cyber, data operations, systems integration and intelligence mission support services to meet our customers' most demanding challenges. Our capabilities include cyber space operations, cyber defense and resiliency, vulnerability research, ubiquitous technical surveillance, data intelligence, lifecycle mission enablement, and software modernization. Nightwing brings disruptive technologies, agility, and competitive offerings to customers in the intelligence community, defense, civil, and commercial markets.
CODEX Overview
CODEX (Cyber Offense and Defense Experts) division brings together an elite team of mission-focused industry experts who are well known for their ability to overcome the most advanced technical challenges. The team comprises engineers of multiple disciplines including vulnerability research, reverse engineering, CNO/CNE development, hardware emulation, system engineering, and data analytics. Our engineers do more than just work with cutting-edge technology-they ensure the missions succeed for the customers! CODEX offices span the nation and offer its engineers the ability to advance their careers through mentorship, training, and an expansive technical portfolio that covers every side of cyber. If you want to be part of a collaborative team that supports challenging, meaningful work that is vital to our national security, apply today!
This position is Hybrid.
Required Qualifications
  • Proficiency in object-oriented programming (OOP):
    • Strong experience in either Python or Java is required, with a demonstrated ability to apply OOP principles effectively. (~9 years cumulative experience)
    • Experience in both languages is highly desired, but it's fine to have more expertise in one than the other. We're looking for a developer who is solid in at least one language and comfortable working in the other.

Must Have At Least ONE of the Following Skill Sets:
Reverse Engineering Skills:
  • Experience writing IDA/Ghidra plugins/scripts
  • Knowledge of x86 Assembly
  • Reverse engineering experience

LLM Application Development Skills:
  • Experience building LLM applications using frameworks such as:
    • Langchain
    • LangGraph
    • LangSmith
  • Experience with embedding stores and vector databases
  • Understanding on how LLM's operate locally

Additional Desired Skills
  • Testing experience with JUnit and/or Pytest
  • Familiarity with gRPC or other RPC protocols
  • Experience with ARM, or PPC Assembly Languages
  • Experience designing agentic workflows and pipelines
  • Under-the-hood understanding of inference servers
  • Understanding of packaging systems (uv, poetry, gradle, etc)

Education
Bachelor of Science in Computer Science or related field
Clearance Required
None, but ability to obtain
The salary associated with this position $77,000-$163,000 is commensurate with the selected candidate's qualifications, years of relevant experience, and demonstrated level of expertise. Compensation will be determined based on these factors to ensure alignment with skills, responsibilities, and market standards.
At Nightwing, we value collaboration and teamwork. You'll have the opportunity to work alongside talented individuals who are passionate about what they do. Together, we'll leverage our collective expertise to drive innovation, solve complex problems, and deliver exceptional results for our clients.
Thank you for considering joining us as we embark on this new journey and shape the future of cybersecurity and intelligence together as part of the Nightwing team.
Nightwing is An Equal Opportunity/Affirmative Action Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status, age or any other federally protected class.

Apply